Vintage Mid-Century Opal Ring in 10k Yellow Gold. In love with opal? The natural opal weighs 1.49 carats and is accentuated by intricate carvings in the shoulders and gallery of the Mid-Century, yellow gold band. The colors of this ring are enchanting, like a watercolor painting come to life. If you are looking for a gift for a Scorpio or Libra, this birthstone ring would make a terrific gift! Any questions on resizing? Contact one of our jewelry experts for more details!